CN107233629A - Injection aquagel and its preparation and application - Google Patents

Injection aquagel and its preparation and application Download PDF

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Publication number
CN107233629A
CN107233629A CN201710473363.0A CN201710473363A CN107233629A CN 107233629 A CN107233629 A CN 107233629A CN 201710473363 A CN201710473363 A CN 201710473363A CN 107233629 A CN107233629 A CN 107233629A
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raw material
injection aquagel
butyraldehyde
hydrogel
polyethylene glycol
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CN107233629B (en
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谭回
李维平
黄贤键
黄国栋
刘文兰
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Shenzhen Second Peoples Hospital
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/52Hydrogels or hydrocolloids
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/08Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
    • A61K47/10Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
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    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/06Ointments; Bases therefor; Other semi-solid forms, e.g. creams, sticks, gels
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
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    • A61L27/26Mixtures of macromolecular compounds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/04Macromolecular materials
    • A61L31/041Mixtures of macromolecular compounds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/14Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L31/145Hydrogels or hydrocolloids
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    • A61L2400/06Flowable or injectable implant compositions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2430/00Materials or treatment for tissue regeneration
    • A61L2430/36Materials or treatment for tissue regeneration for embolization or occlusion, e.g. vaso-occlusive compositions or devices

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Abstract

The invention discloses a kind of injection aquagel and its preparation and application.The injection aquagel is constituted by raw material A, raw material B and into glue;The mass percent of raw material A and raw material B quality sum in hydrogel is 5% 50%, and wherein raw material A is butyraldehyde polyethylene glycol butyraldehyde, and raw material B is the polyethylene glycol that four arm Amino End Groups are modified;The amino of the main polyethylene glycol modified using four arm Amino End Groups and the imines dynamic key of the aldehyde radical formation of butyraldehyde polyethylene glycol butyraldehyde obtain syringeability hydrogel;The injection aquagel can be applied as pharmaceutical carrier, embolism materials or tissue engineering material etc..The preparation method of the injection aquagel, including step:Raw material A and raw material B addition glues are well mixed, injection aquagel is obtained;It is easy, quick with preparation process, it is easy to the advantage of large-scale production.

Description

Injection aquagel and its preparation and application
Technical field
The invention belongs to biomolecule pharmaceutical technology field, and in particular to a kind of injection aquagel and its preparation and should With.
Background technology
Hydrogel is the three-dimensional net structure by high molecular crosslink, in biomedicine field such as insoluble drug release, organizational project Had a wide range of applications with bio-sensing etc..In minimally invasive medical and injectable organizational project, Injectable in-situ gel system by Extensive concern is arrived.Gel-in-matrix before the injection by biomolecule or mixing with cells in the solution, through injection can will bear The timbering material for having carried biomolecule or cell is implanted to and needs position, after gelation, becomes and is released for the medicine in pharmaceutical preparation Put basic point or the cell growth basic point of regeneration, it is to avoid operation implantation it is painful and cumbersome, and cells in situ fixation also has Beneficial to one irregular tissue defects of filling.
At present, preparing the method for situ-gel system has chemical crosslinking and is physical crosslinking, and chemical crosslinking includes radical polymerization Conjunction and Michael's addition etc., it usually needs add initiator or generation small molecule by-product, physical crosslinking passes through physical change bag Include the change realization such as pH value, temperature and ionic strength.The hydrogel (i.e. dynamic key gel) constructed using dynamic covalent bond is had Higher mechanical strength and syringeability, and because sensitive group is chemical bond, so as to greatly widen optional macromolecule material The scope of material, can construct the hydrogel with multiple response.Poplar etc. can construct pH/ temperature sensitives using saccharin key Injectable chitosan matrix hydrogel, saccharin key has physiological pH response, can trigger gel by adjusting pH value Formation and destruction, it is not necessary to initiator, and the small molecule product of the reaction is water, it is to avoid impurity draws in gel process Enter;The hydrogel of formation has preferable mechanical strength, and at macromolecule content relatively low (5.0wt%), its modulus of elasticity is reachable 103-104Pa, the hydrogel can be used for the long-acting controlled release of antineoplastic, and achieve preferable oncotherapy effect (Dually Responsive Injectable Hydrogel Prepared by In Situ Cross-Linking of Glycol Chitosan and Benzaldehyde-Capped PEO-PPO-PEO,Biomacromolecules 2010, 11,1043-1051).Borate ester is reacted by phenyl boronic acid derivative and polyol to be formed, and reaction does not need initiator, Do not produce other accessory substances than water, with glucose oxidase (GOx), agglutinin be construct glucose responding system three Big system.Glucose oxidase and agglutinin are protein compound, and harsher to environmental requirement, the change of external environment can It can be caused to inactivate, limit its application.And the diversity and more preferable stability that imine linkage is designed due to it, in development Portugal There is larger advantage in terms of grape sugar Response System, cause researchers and more widely pay close attention to.There is document report by benzene boron Gel and microgel that acid and NIPA (PNIPAM) are constituted, can be swelled and release in the presence of glucose Release insulin, but these materials ability only under higher than phenyl boric acid pKa value (pH 9) and higher concentration of glucose (20g/L) With glucose responding, the application of its (pH 7.4, concentration of glucose 1-3g/L) in physiological conditions is limited (Synthesis and Volume Phase Transitions of Glucose-Sensitive Microgels, Biomacromolecules 2006,7,3196-3201,Phenylboronic acid-based glucose- responsive polymeric nanoparticles:synthesis and applications in drug delivery,Polym.Chem.,2014,5,1503-1518)。
The content of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of biodegradable injectable water-setting of safety non-toxic Glue, the aldehyde radical shape of the amino and butyraldehyde-polyethylene glycol-butyraldehyde of the main polyethylene glycol using the modification of the arm Amino End Group of specific structure four Into imines dynamic key obtain syringeability hydrogel.
It is easy, quick with preparation process, it is easy to big present invention also offers the preparation method of the injection aquagel The advantage of large-scale production.
The concrete technical scheme that the present invention takes is as follows:
A kind of injection aquagel, is constituted by raw material A, raw material B and into glue;The quality sum of the raw material A and raw material B Mass percent in hydrogel is 5%-50%, and wherein raw material A is butyraldehyde-polyethylene glycol-butyraldehyde, and raw material B is four arm ends Amido modified polyethylene glycol;
The structural formula of the butyraldehyde-polyethylene glycol-butyraldehyde is as shown in formula I:
M is 10-16000 integer in formula I, formula I;
The structural formula of the polyethylene glycol of the four arms Amino End Group modification is as shown in formula II:
N is in formula II, formula II 565-5700 integer.
Injection aquagel of the present invention, using four arm Amino End Groups shown in butyraldehyde-polyethylene glycol-butyraldehyde shown in formula I and formula II The polyethylene glycol of modification, both structures are the macromolecular with good aqueous solubility, the polyethylene glycol of four arm Amino End Groups modification In four arm configurations the network with hydrophilic soft segment, butyraldehyde-polyethylene glycol-butyraldehyde can be provided for hydrogel Linear chain structure also act as soft segment, both distinctive structures ensure that the hydrogel to be formed has in aqueous Porous and fine and close structure, obtained hydrogel has excellent flexibility and elasticity, and slow release effect is controllable;Meanwhile, four arm ends The amino of amido modified polyethylene glycol and the imines dynamic key of the aldehyde radical formation of butyraldehyde-polyethylene glycol-butyraldehyde have to pH rings Ying Xing, can be formed in situ the gel that uniform state is presented, can be implanted by injection system.
Consider raw material A and the specific chemical constitutions of raw material B, in order to reach more preferable invention effect, preferably:
The raw material A and raw material B mass ratio are (0.5-25):1, the stability and injectable of hydrogel can be strengthened Property.
The mass percent of the raw material A and raw material B quality sum in hydrogel is 5%-30%, further preferably For 5%-20%, most preferably 5%-15%.When raw material A and raw material B gross mass percentage concentration is 5%-20%, injectivity is more It is excellent;When raw material A and raw material B gross mass percentage concentration are more than 20% and are less than or equal to 50%, the stability of gel is more preferable.It is former When the gross mass percentage concentration for expecting A and raw material B is 5%-15%, not only injectivity is excellent, and preferably in human normal body Quick-gelatinizing under the conditions of warm scope (general 36.0 DEG C -37.5 DEG C) and normal physiological pH7.4.The present invention can be according to hydrogel Application field is different, selects suitable raw material A and raw material B gross mass concentration range.
It is described to select deionized water or pH value in 6-8 cushioning liquid into glue, provide plastic environment for hydrogel.
The cushioning liquid can using disodium hydrogen phosphate-citrate buffer solution, potassium dihydrogen phosphate-sodium hydrate buffer solution, Disodium hydrogen phosphate-phosphate sodium dihydrogen buffer solution, barbital sodium-hydrochloride buffer, three (methylol) aminomethane-hydrochloride buffers (Tris-HCl buffer solutions), boric acid-borate buffer solution, Glycine-NaOH buffer solution, borax-sodium hydrate buffer solution, carbon One or more in the cushioning liquid such as sour sodium-sodium bicarbonate buffer liquid.
According to the requirement of its application field, it is described can select into glue it is sterile into glue.
The preparation method of the injection aquagel, including step:
Raw material A and raw material B addition glues are well mixed, injection aquagel is obtained.
The formation temperature of the injection aquagel is at 20 DEG C -38 DEG C.
Raw material used in the present invention can be prepared using commercially available prod or using existing preparation method.
The injection aquagel, with pH responses and syringeability, can be used as pharmaceutical carrier, embolism materials or group Knit the application such as engineering material.The injection aquagel uses the raw material A and raw material B of specific structure and molecular weight ranges, especially Beneficial to the pharmaceutical carrier as load small-molecule drug such as adriamycin (DOX), drug release rate can adjust.
The invention has the advantages that:
(1) raw material of subject hydrogel uses the macromolecular with good aqueous solubility, and raw material safety non-toxic itself can give birth to Thing is degraded, and the forming process of gel overcomes potential safety hazard when being used in water gel without using organic solvent.Raw material A It is existing high-molecular compound with raw material B, it is chemical synthesis that it, which is originated, compared to coming from that current hydrogel is largely used High-molecular compound in plant and animal body, the raw material of chemical synthesis has structure-controllable system, it is easier to adjust hydrogel The advantages such as intensity, degradation speed, drug releasing rate.
(2) subject hydrogel is mainly the aldehyde on the amino in specific structure macromolecular and another specific structure macromolecular Base reacts to form imine linkage, more stable under normal body temperature's scope and normal physiological pH value, can be by under solutions of weak acidity Gradually hydrolyze to form solution.Because imine linkage is relatively stablized under normal physiological conditions, easily hydrolyze under mildly acidic conditions, this hair It is bright can by adjust two kinds of raw materials ratio, control generation imine linkage ratio so that intelligence control gel formation when Between, the degradation rate of the release of the compactness extent of gel, medicine and gel.
(3) subject hydrogel has certain intensity and toughness, due to generating imine linkage during gel is formed, With self-repairability, gelling performance can be regulated and controled by the molecular weight of raw material and the ratio of raw material, further increase the life of gel Thing compatibility;Gel prepared by the present invention has biodegradability, can be by body metabolism;With pH responses and injectable Property, it can be used as pharmaceutical carrier, embolism materials and tissue engineering material etc..
(4) preparation method of injection aquagel of the present invention is easy, quick with preparation process, it is easy to mass produce Advantage.
Brief description of the drawings
Fig. 1 is the electron-microscope scanning figure of injection aquagel in the embodiment of the present invention 1;
Fig. 2 is the rheogram of injection aquagel in the embodiment of the present invention 3;Wherein G ' expressions storage modulus, G " represent to damage Consume modulus;
Fig. 3 is bent for the drug accumulation release under medicine injection aquagel is carried in application examples 3 of the present invention in two kinds of pH environment Line chart;
Fig. 4 is the medicine cumulative release curve in pH7.4 environment of load medicine injection aquagel in application examples 1 of the present invention Figure.
Embodiment
With reference to specific embodiment to further description of the present invention.Present embodiment is not to its protection domain Limitation.
Embodiment 1
0.5g butyraldehyde-polyethylene glycol-butyraldehyde (m=100) and the arm Amino End Groups of 1g tetra- are modified polyethylene glycol (n=1000, Laysan) plus 28.5g aseptic deionized waters, 37 DEG C of rapid concussions are well mixed, obtain that 30g is transparent, uniform state after 35 seconds Injection aquagel.
The electron-microscope scanning figure of the injection aquagel is shown in Fig. 1, and display hydrogel has porous and fine and close structure, and aperture exists 0.1mm-0.4mm。
Embodiment 2
5g butyraldehyde-polyethylene glycol-butyraldehyde (m=16000) and the arm Amino End Groups of 1g tetra- are modified polyethylene glycol (n=5000, Laysan 34g disodium hydrogen phosphates-citrate buffer solution (pH=6.5)) is added, 37 DEG C of rapid concussions are well mixed, obtained after 30 seconds 40g is transparent, uniform state injection aquagel.
The electron-microscope scanning figure of gained injection aquagel shows that hydrogel has porous and fine and close structure, and aperture exists 0.1mm-0.3mm。
Embodiment 3
Polyethylene glycol (the n=that 14g butyraldehyde-polyethylene glycol-butyraldehyde (m=10000) and the arm Amino End Groups of 1g tetra- are modified 5700, Laysan) 85g disodium hydrogen phosphates-phosphate sodium dihydrogen buffer solution (pH=7.4) is added, 37 DEG C of rapid concussions are well mixed, 25 Obtain that 100g is transparent, uniform state injection aquagel after second.
The electron-microscope scanning figure of gained injection aquagel shows that hydrogel has porous and fine and close structure, and aperture exists 0.1mm-0.3mm。
Embodiment 4
25g butyraldehyde-polyethylene glycol-butyraldehyde (m=10) and the arm Amino End Groups of 1g tetra- are modified polyethylene glycol (n=565, Laysan 234g barbital sodiums-hydrochloride buffer (pH=6)) is added, 38 DEG C of rapid concussions are well mixed, and obtaining 260g after 32 seconds is in Transparent, uniform state injection aquagel.
The electron-microscope scanning figure of gained injection aquagel shows that hydrogel has porous and fine and close structure, and aperture exists 0.1mm-0.3mm。
Embodiment 5
20g butyraldehyde-polyethylene glycol-butyraldehyde (m=5000) and the arm Amino End Groups of 1g tetra- are modified polyethylene glycol (n=2500, Laysan 84g Tris-HCl buffer solutions (pH=6.4)) are added, 37 DEG C of rapid concussions are well mixed, and 105g is obtained after 22 seconds in thoroughly Bright, uniform state injection aquagel.
The electron-microscope scanning figure of gained injection aquagel shows that hydrogel has porous and fine and close structure, and aperture exists 0.1mm-0.2mm。
Embodiment 6
25g butyraldehyde-polyethylene glycol-butyraldehyde (m=8000) and the arm Amino End Groups of 1g tetra- are modified polyethylene glycol (n=4000, Laysan 61g Glycine-NaOHs buffer solution (pH=7.6)) is added, 20 DEG C of rapid concussions are well mixed, and 87g is obtained after 18 seconds Transparent, uniform state injection aquagel.
The electron-microscope scanning figure of gained injection aquagel shows that hydrogel has porous and fine and close structure, and aperture exists 0.1mm-0.3mm。
Embodiment 7
Polyethylene glycol (the n=that 10g butyraldehyde-polyethylene glycol-butyraldehyde (m=13000) and the arm Amino End Groups of 1g tetra- are modified 3200, Laysan) 11g boric acid-borate buffer solution (pH=8) is added, 30 DEG C of rapid concussions are well mixed, and obtaining 22g after 12 seconds is in Transparent, uniform state injection aquagel.
The electron-microscope scanning figure of gained injection aquagel shows that hydrogel has porous and fine and close structure, and aperture exists 0.1mm-0.3mm。
The property of subject hydrogel Drug controlled release is explored using adriamycin as model drug:
Application examples 1
The poly- second that adriamycin 500mg, 0.5g butyraldehyde-polyethylene glycol-butyraldehyde (m=100) and the arm Amino End Groups of 1g tetra- are modified Glycol (n=1000, Laysan) plus 28.4g aseptic deionized waters, 37 DEG C of rapid concussions are well mixed, and obtaining 30g after 35 seconds is in Transparent, uniform state injectable carries liquid medicine gel, envelop rate 85%, drugloading rate 1.42%.
Application examples 2
The poly- second that adriamycin 700mg, 5g butyraldehyde-polyethylene glycol-butyraldehyde (m=16000) and the arm Amino End Groups of 1g tetra- are modified Glycol (n=5000, Laysan) plus 33.9g disodium hydrogen phosphates-citrate buffer solution (pH=6.5), 37 DEG C of rapid concussion mixing Uniformly, obtain that 40g is transparent, injectable of uniform state carries liquid medicine gel, envelop rate 90%, drugloading rate 1.58% after 30 seconds.
Application examples 3
By adriamycin 1.5g, 14g butyraldehyde-polyethylene glycol-butyraldehyde (m=10000) and the amido modified poly- second of the arm of 1g ends four Glycol (n=5700, Laysan) plus 84.9g disodium hydrogen phosphates-phosphate sodium dihydrogen buffer solution (pH=7.4), 37 DEG C of rapid concussions It is well mixed, obtain that 100g is transparent, uniform state injectable carries liquid medicine gel, envelop rate 92%, drugloading rate after 25 seconds 1.38%.
Subject hydrogel, shortens, the gelation time of hydrogel can be square with the increase gelation time of polymer concentration Just control was at -35 seconds 12 seconds.Subject hydrogel gelation time is shorter, and each raw material and solution are avoided when can inject in the original location Gel molecular concentration moment is diluted by body fluid etc. and influences the formation of hydrogel after mixing, with syringeability, can it is in situ into Glue.
Injection aquagel in embodiment 1-6 is used into survey of the rheometers of RS 6000 (Thermo-Fisher) at 37 DEG C Try to carry out rheological analysis test, by taking the rheogram (as shown in Figure 2) of injection aquagel in embodiment 3 as an example, rheology on platform As a result show:Increasing over time storage modulus G ' and loss modulus G " gradually strengthens, same time condition storage modulus G ' Significantly greater than loss modulus G ", shows that subject hydrogel is mesh-structured for elasticity.
In application examples 1-3 after hydrogel carrying medicament, the gelation time of hydrogel does not change, and shows subject hydrogel Gel can be quickly formed before and after carrying medicament, good syringeability is respectively provided with.
Gained in application examples 1-3 is carried into liquid medicine gel to be placed in 10ml pH=7.4 phosphate buffer solution (PBS is molten Liquid) or pH=6.5 PBS solution in, 37 DEG C, vitro drug release is carried out in 40rpm constant temperature oscillators, when multiple Between select (T) and take 1ml supernatants, the fresh PBS solution for filling into 1ml after supernatant in time is taken every time, using the detection of HPLC methods it is each when Doxorubicin content in section supernatant (sample), calculates drug accumulation release rate (%).
HPLC testing conditions:Dissolved again with 0.5mL mobile phases, with RPLC (RP-HPLC, Agilent 1200, Agilent Technologies Inc., USA) detect its concentration.20 μ L samples are expelled to ZORBAX Eclipse Plus C18 chromatographic columns (150mm × 4.6mm), 5.0 μm, Agilent Corp., USA) in, washed with 1mL/min elution speed De-, flowing phase composition is acetonitrile/water/methanol (48/41/11, v/v/v), and ultraviolet detection wavelength is 227nm.DOX in release liquid Content detects that Detection wavelength is 485nm with ultraviolet-visible spectrophotometer.Releasing result is with the average value of three retests Draw.
Drug accumulation release rate=(T time insoluble drug release gross mass ÷ actual loadings drug quality) × 100%.
The drug accumulation releasing curve diagram of the load medicine injection aquagel of application examples 3 is shown under Fig. 3, different pH condition, medicine Thing rate of release is different, shows that injection aquagel of the present invention has pH responses, when pH7.4, drug releasing rate It is relatively slow, under mildly acidic conditions (during such as pH6.5), due to unstable, the reduction of gel cross-linkage point, drug releasing rate of imine linkage Accelerate.
The drug accumulation releasing curve diagram of the load medicine injection aquagel of application examples 1 is shown in Fig. 4, and the load medicine of application examples 2 can be noted The drug accumulation releasing result of jetting gel and the drug accumulation releasing result of application examples 1 are essentially identical, its drug release patterns Shown in figure, the adriamycin in subject hydrogel can be sustained, and it can be effectively sustained up to 12 hours.
The drug accumulation releasing result that the present invention carries medicine injection aquagel shows this gel delivery systme as chemotherapy There is application value in slow releasing carrier of medication.There is degradability additionally, due to subject hydrogel, in the material implanted, such as bolt There is application value in plug material or tissue engineering material etc. field.

Claims (10)

1. a kind of injection aquagel, it is characterised in that the injection aquagel is constituted by raw material A, raw material B and into glue; The mass percent of the raw material A and raw material B quality sum in hydrogel is 5%-50%, and wherein raw material A is butyraldehyde-poly- Ethylene glycol-butyraldehyde, raw material B is the polyethylene glycol that four arm Amino End Groups are modified;
The structural formula of the butyraldehyde-polyethylene glycol-butyraldehyde is as shown in formula I:
M is 10-16000 integer in formula I;
The structural formula of the polyethylene glycol of the four arms Amino End Group modification is as shown in formula II:
N is 565-5700 integer in formula II;
It is described into glue be the cushioning liquid of deionized water or pH value in 6-8.
2. injection aquagel according to claim 1, it is characterised in that the raw material A and raw material B mass ratio is (0.5-25):1.
3. injection aquagel according to claim 1 or 2, it is characterised in that the raw material A and raw material B quality it It is 5%-30% with the mass percent in hydrogel.
4. injection aquagel according to claim 1 or 2, it is characterised in that the raw material A and raw material B quality it It is 5%-20% with the mass percent in hydrogel.
5. injection aquagel according to claim 1 or 2, it is characterised in that the raw material A and raw material B quality it It is 5%-15% with the mass percent in hydrogel.
6. injection aquagel according to claim 1, it is characterised in that the cushioning liquid using disodium hydrogen phosphate- Citrate buffer solution, potassium dihydrogen phosphate-sodium hydrate buffer solution, disodium hydrogen phosphate-phosphate sodium dihydrogen buffer solution, barbital sodium- Hydrochloride buffer, three (methylol) aminomethane-hydrochloride buffers, boric acid-borate buffer solution, Glycine-NaOH buffering One or more in liquid, borax-sodium hydrate buffer solution, sodium carbonate-bicarbonate buffer solution.
7. the preparation method of the injection aquagel according to claim any one of 1-6, it is characterised in that including step: Raw material A and raw material B addition glues are well mixed, injection aquagel is obtained.
8. the preparation method of injection aquagel according to claim 7, it is characterised in that the injection aquagel Temperature is formed at 20 DEG C -38 DEG C.
9. the injection aquagel according to claim any one of 1-6 is being used as pharmaceutical carrier, embolism materials or tissue Application in engineering material.
10. application according to claim 9, it is characterised in that described pharmaceutical carrier is for loading small-molecule drug Pharmaceutical carrier.
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